[lkml]   [2010]   [Apr]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Can we remove the Zone_DMA?
    Am Sonntag, 4. April 2010 06:21:54 schrieb tek-life:
    > In Linux , The Memory is divided to three zone. They are ZONE_DMA
    > 、ZONE_NORMAL and ZONE_HIGHMEM. From the book of "Undstand the Linux
    > kernel ", the ZONE_DMA has the effect that the Direct Memory Access
    > (DMA) processors for old ISA buses have a strong limitation: they are
    > able to address only the first 16 MB of RAM. SO ,we must set a zone
    > for the DMA on ISA bus. And I suspect that the hardware has
    > developed so quickly .And in this days the ISA has been weeded out.

    Floppy disks & paralell ports still use DMA

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2010-04-04 09:33    [W:0.019 / U:3.236 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site